Here are a number of sites, resources that as an enthusiast, WW historian, serviceman or family member of the 2nd Bombardment Group you might enjoy and find relevant.
Army Air Corps Library and Museum US Army Air Forces World War II
AACLM: 2nd Bombardment Group
US National Archives
Air Force Historical Research Agency
2nd Bombardment Group Association
1st Fighter Group 1st FG 15th Air Force WW2
2nd Bombardment Group2nd BG 15th Air Force WW2
12th Bombardment Group
14th Fighter Group 14th FG 15th Air Force WW2
17th Bombardment Group
31st Fighter Group
47th Bombardment Group
52nd Fighter Group
82nd Fighter Group 82nd FG 15th Air Force WW2
97th Bombardment Group 97th BG 15th Air Force WW2
98th Bombardment Group 98th BG 15th Air Force WW2
99th Bombardment Group 99th BG 15th Air Force WW2
301st Bombardment Group 301st BG 15th Air Force WW2
310st Bombardment Group
320th Bombardment Group
321st Bombardment Group
325th Fighter Group 325th FG 15th Air Force WW2
332nd Fighter Group
376th Bombardment Group 376th BG 15th Air Force WW2
445th Bombardment Group
449th Bombardment Group
450th Bombardment Group
451st Bombardment Group
454th Bombardment Group
455th Bombardment Group
456th Bombardment Group
459th Bombardment Group
460th Bombardment Group
461st Bombardment Group
463rd Bombardment Group
464th Bombardment Group
465th Bombardment Group
483rd Bombardment Group
484th Bombardment Group
485th Bombardment Group
2641st Special Group (885th BS)